Self-circulation complex iron wet desulphurization skid-mounted device

Abstract

The utility model provides a self-circulation complex iron wet desulphurization skid-mounted device which comprises at least one skid-mounted unit (1) suitable for skid-mounted, and the skid-mounted unit (1) comprises at least one absorption treatment section (2) used for carrying out absorption reaction with sulfur-containing gas and / or at least one oxidation treatment section (3) used for regenerating desulfurized liquid; the absorption treatment section (2) or the oxidation treatment section (3) comprises a gas distributor (4), and the gas distributor (4) pushes desulfurization liquid to flow out of the absorption treatment section (2) or the oxidation treatment section (3) and is used for self-circulation of the desulfurization liquid. The oxidation treatment section and / or the absorption treatment section are integrated or dispersed into a plurality of skid-mounted units, so that transportation and splicing can be facilitated according to different geographic positions of application scenes, and the matched skid-mounted units can be planned for treatment according to the desulfurization treatment capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization, in particular to a self-circulating complex iron wet desulfurization skid-mounted device. Background Art

[0002] The existing complex iron wet desulfurization process equipment generally adopts a tower reactor structure. The first type of tower reactor includes a conical cylinder and an inner isolation tube arranged inside the conical cylinder. The inner isolation tube is introduced with sulfur-containing gas to react with the desulfurized liquid to form an absorption zone, and the outside of the inner isolation tube is introduced with air to oxidize the desulfurized liquid to form an oxidation zone, and the conical part is used to collect the reduced sulfur precipitate. Figure 1 shown.

[0003] However, the above-mentioned complex iron wet desulfurization process device has the following disadvantages:

[0004] 1. The conical area occupies a large space in the entire complex iron wet desulfurization process device, which cannot be effectively utilized, resulting in a waste of materials and increased costs.

[0005] 2. The overall diameter of the tower reactor structure is large, the height is high, and the volume is large. It cannot be moved and transported, and can only be used for fixed production.

[0006] The current complex iron wet desulfurization process device is not suitable for the following application scenarios, for example, the desulfurization treatment itself is large-scale and the equipment size is large; the desulfurization treatment is temporarily required, and the desulfurization treatment needs to be changed. At present, in order to achieve skid installation, the absorption tower is often designed as several absorption towers, and the oxidation tower is designed as several oxidation towers. Pumps are used to realize the circulation of desulfurization liquid between different absorption towers or oxidation towers. This requires the addition of liquid level gauges, control valves, circulation pumps and other hardware and software; in order to reduce the circulation volume and reduce electricity costs, it is sometimes necessary to increase the operating concentration of the desulfurization agent, but the high concentration of the desulfurization agent has the following disadvantages: the initial filling amount needs to be increased, and the initial investment is high; the concentration of the desulfurization agent is high, the degradation of the desulfurization agent is large, and the amount of desulfurization agent carried away by the desulfurization product sulfur paste increases, which increases the operating cost. Summary of the invention

[0007] The utility model provides a self-circulating complex iron wet desulfurization skid-mounted device, characterized in that it comprises at least one skid-mounted unit (1) which is completely suitable for skid mounting, wherein the skid-mounted unit (1) comprises at least one absorption treatment section (2) for absorption reaction with sulfur-containing gas and / or at least one oxidation treatment section (3) for regenerating desulfurized liquid; the absorption treatment section (2) or the oxidation treatment section (3) comprises a gas distributor (4), and the gas distributor (4) promotes the outflow of desulfurized liquid from the absorption treatment section (2) or the oxidation treatment section (3) for self-circulation of desulfurized liquid;

[0008] The head and tail of the skid-mounted unit (1) are connected via a liquid pipeline (5) to form a self-circulation of the desulfurization liquid; or, the head and tail of adjacent skid-mounted units (1) are connected via a liquid pipeline (5), and the head and tail of the entire skid-mounted device are connected via a liquid pipeline (5) to form a self-circulation of the desulfurization liquid.

[0009] Preferably, the skid-mounted unit (1) comprises at least one absorption treatment section (2), at least one oxidation treatment section (3) and at least one settling zone (7) for precipitating desulfurized liquid.

[0010] Preferably, the absorption treatment section (2) further comprises an absorption zone (21) separated by a first weir plate (22), wherein the absorption zone (21) is provided with a gas distributor (4) for mixing the sulfur-containing gas with the desulfurized liquid and pushing the desulfurized liquid to flow out from the top of the first weir plate (22);

[0011] The oxidation treatment section (3) further comprises an oxidation zone (31) separated by a second weir plate (32), wherein the oxidation zone (31) is provided with a gas distributor (4) for mixing the oxygen-containing gas with the desulfurized liquid and pushing the desulfurized liquid to flow out from the top of the second weir plate (32).

[0012] Preferably, a first baffle (24) is arranged after the first weir plate (22) of the absorption zone (21), and a reaction zone (23) is formed between the first weir plate (22) and the first baffle plate (24) for causing the hydrogen sulfide in the desulfurization liquid to undergo a reduction reaction.

[0013] Preferably, a second baffle (34) is arranged behind the second weir plate (32) of the oxidation zone (31), and a degassing zone (33) is formed between the second weir plate (32) and the second baffle plate (34) for causing the complex iron in the desulfurization liquid to undergo an oxidation reaction.

[0014] Preferably, the skid-mounted unit (1) further comprises a box body suitable for container transportation; a desulfurization liquid supply unit is arranged in the box body, and / or an air supply unit is arranged in the box body,

[0015] And / or a sulfur-containing gas supply unit is arranged in the box body to supply desulfurization liquid, air and sulfur-containing gas respectively.

[0016] Preferably, the gas distributor (4) is detachably connected to the gas delivery pipeline (6), and a control valve for controlling the flow rate of the gas distributor (4) is provided on the gas delivery pipeline (6).

[0017] The advantages of the utility model are: 1. The self-circulating complex iron wet desulfurization skid-mounted device of the utility model integrates or disperses the oxidation treatment section and / or absorption treatment section into multiple skid-mounted units, which can be conveniently transported and spliced ​​according to the different geographical locations of the application scenarios, and can be processed according to the skid-mounted units that match the desulfurization treatment volume planning.

[0018] 2. The utility model's self-circulating complex iron wet desulfurization skid-mounted device has a plug flow of desulfurization liquid, high reaction efficiency, and avoids back-mixing.

[0019] 3. The self-circulating complex iron wet desulfurization skid-mounted device of the utility model has a self-circulating desulfurization liquid, which can realize the flow between different areas under the promotion of the gas distributor, and can greatly save the hardware investment of liquid level gauge, control valve, circulation pump, etc. The self-circulation volume is large, which can reduce the operating concentration of the desulfurization agent (chemical measurement requirement: the circulation volume of the agent * the concentration of the agent is greater than or equal to the chemical measurement requirement of the total amount of hydrogen sulfide removed), reduce the concentration of the running desulfurization agent, and thus greatly reduce the initial filling volume of the agent, the agent consumption during operation, and the operating electricity cost.

[0020] 4. In the self-circulating complex iron wet desulfurization skid-mounted device of the utility model, the gas distributor is detachably connected to the gas delivery pipeline, so that each gas distributor can be independently maintained and repaired. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 . A schematic longitudinal cross-sectional view of the structure and material flow of the first type of tower reactor in the prior art;

[0022] Figure 2 . The skid-mounted device in Example 1 of the utility model includes a schematic diagram of the skid-mounted unit structure (rectangular structure);

[0023] Figure 3 . The skid-mounted device in Example 1 of the utility model includes a schematic diagram of the skid-mounted unit structure (cylindrical structure);

[0024] Figure 4 . A schematic diagram of the structure of the skid-mounted device in Example 1 of the utility model including an absorption treatment section, an oxidation treatment section and a sedimentation zone (rectangular structure);

[0025] Figure 5 . A schematic diagram of the structure of the skid-mounted device in Example 1 of the utility model including two skid-mounted units or one skid-mounted unit with two parallel processing sections (rectangular parallelepiped structure);

[0026] Among them, 1. skid mounted unit; 2. absorption treatment section; 21. absorption zone; 22. first weir plate; 23. reaction zone; 24. first baffle plate; 3. oxidation treatment section; 31. oxidation zone; 32. second weir plate; 33. degassing zone; 34. second baffle plate; 4. gas distributor; 5. liquid pipeline; 6. gas delivery pipeline; 7. settling zone. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0028] Embodiment 1:

[0029] like Figure 2-5 As shown, this embodiment provides a self-circulating complex iron wet desulfurization skid-mounted device, including at least one skid-mounted unit 1 suitable for skid mounting, the skid-mounted unit 1 includes at least one absorption treatment section 2 for absorption reaction with sulfur-containing gas and / or at least one oxidation treatment section 3 for regenerating desulfurization liquid; the absorption treatment section 2 or the oxidation treatment section 3 includes a gas distributor 4, the gas distributor 4 promotes the outflow of desulfurization liquid from the absorption treatment section 2 or the oxidation treatment section 3, and is used for self-circulation of desulfurization liquid; the head and tail of the skid-mounted unit 1 are connected by a liquid pipeline 5 to form self-circulation of desulfurization liquid; or, the head and tail of adjacent skid-mounted units 1 are connected by a liquid pipeline 5, and the head and tail of the entire skid-mounted device are connected by a liquid pipeline 5 to form self-circulation of desulfurization liquid.

[0030] The other pressures at the top of each adjacent absorption treatment section 2 and / or oxidation treatment section 3 are P1 and P2 respectively, and the pressure at the bottom of the first baffle 24 or the second baffle 34 is p=ρgh (p is pressure, ρ is liquid density, and h is the height between a certain point of the liquid and the liquid surface. At this time, the driving force for the flow of liquid at the bottom of the first baffle 24 or the second baffle 34 is: (P1+p1)-(P2+p2)=(P1+ρ1gh)-(P2+ρ2gh)=P1-P2+(ρ1-ρ2)gh.

[0031] In the above driving force, the pressures of P1 and P2 are roughly the same (usually atmospheric pressure). The desulfurization liquid on both sides of the first baffle 24 or the second baffle 34 has different densities due to different gas contents. Among them, the left side of the first baffle 24 or the second baffle 34 has a relatively small gas content, and its density ρ1 is greater than the density ρ2 on the right side. The driving force for self-circulation forms the desulfurization liquid to automatically flow from the high-density side of the first baffle 24 or the second baffle 34 to the low-density side, forming a self-circulation. As long as the above driving force is controlled to be a positive value in the equipment, the desulfurization liquid can be self-circulated.

[0032] By introducing oxygen or sulfur-containing gas into the skid-mounted unit 1, the skid-mounted unit 1 is controlled to act as an absorption treatment section 2 or an oxidation treatment section 3. It should be understood that as long as it is suitable for skid mounting, the skid-mounted unit 1 can be realized by a rectangular parallelepiped structure. Figure 2 , can also be achieved through a cylindrical structure Figure 3 .

[0033] In this way, the oxidation treatment section and / or absorption treatment section are integrated or dispersed into multiple skid-mounted units, which can be easily transported and spliced ​​according to the different geographical locations of the application scenarios, and can be processed according to the skid-mounted units that match the desulfurization treatment volume planning. At this time, the desulfurization liquid is a plug flow, with high reaction efficiency and avoids back mixing. The desulfurization liquid is self-circulating, and the flow between different areas is achieved under the promotion of the gas distributor, which can greatly save the hardware investment and energy consumption of liquid level meters, control valves, circulation pumps, etc.

[0034] As a specific embodiment, the skid-mounted unit 1 includes at least one absorption treatment section 2, at least one oxidation treatment section 3 and at least one settling area 7 for desulfurized liquid precipitates.

[0035] like Figure 4 As shown, in combination with the supply of other materials, sulfur-containing gas treatment and desulfurization liquid regeneration can be achieved in one skid-mounted unit, which is convenient for transportation and installation.

[0036] As a specific embodiment, the absorption treatment section 2 further includes an absorption zone 21 separated by a first weir plate 22, and the absorption zone 21 is provided with a gas distributor 4 to mix the sulfur-containing gas with the desulfurized liquid and push the desulfurized liquid to flow out from the top of the first weir plate 22;

[0037] The oxidation treatment section 3 also includes an oxidation zone 31 separated by a second weir plate 32 . The oxidation zone 31 is provided with a gas distributor 4 to mix the oxygen-containing gas with the desulfurized liquid and push the desulfurized liquid to flow out from the top of the second weir plate 32 .

[0038] In the absorption treatment section 2, the gas distributor 4 in the absorption zone 21 blows out the sulfur-containing gas to fully mix with the desulfurized liquid and push the desulfurized liquid out from the top of the first weir plate 22 to enter the oxidation treatment section 3. In the oxidation treatment section 3, the gas distributor 4 also blows out air to fully mix with the desulfurized liquid and push the desulfurized liquid out from the top of the second weir plate 32. It should be understood that the above-mentioned absorption treatment section 2 can be connected to the second absorption treatment section 2, and can also be connected to the oxidation treatment section 3. Similarly, the oxidation treatment section 3 can be connected to the second oxidation treatment section 3 or the absorption treatment section 2, and the design can be flexibly performed according to needs.

[0039] As a specific embodiment, a first baffle 24 is arranged behind the first weir plate 22 of the absorption zone 21, and a reaction zone 23 is formed between the first weir plate 22 and the first baffle plate 24, for reducing the hydrogen sulfide in the desulfurized liquid. In this way, the hydrogen sulfide gas dissolved in the desulfurized liquid can fully react.

[0040] As a specific embodiment, a second baffle 34 is arranged behind the second weir plate 32 of the oxidation zone 31, and a degassing zone 33 is formed between the second weir plate 32 and the second baffle plate 34, for oxidizing the complex iron in the desulfurized liquid. In this way, the divalent iron ions in the desulfurized liquid can be fully oxidized and regenerated.

[0041] As a specific embodiment, the skid-mounted unit 1 further comprises a box body suitable for container transportation; a desulfurization liquid supply unit is arranged in the box body, and / or an air supply unit is arranged in the box body,

[0042] And / or a sulfur-containing gas supply unit is arranged in the box body to supply desulfurization liquid, air and sulfur-containing gas respectively.

[0043] The self-circulating complex iron wet desulfurization process requires supply for the main reaction of the process, and the supply of these supplies is also set on a box suitable for container transportation, so as to meet the desulfurization treatment needs of specific application scenarios. It should be understood that these supplies can be set in independent boxes as needed, or the supply units can be divided in the box as needed.

[0044] As a specific implementation, the gas distributor 4 is detachably connected to the gas delivery pipeline 6 , and a control valve for controlling the flow rate of the gas distributor 4 is provided on the gas delivery pipeline 6 .

[0045] In this way, when the gas distributor needs to be maintained or replaced, the control valve can be directly closed and the gas distributor 4 can be disassembled for maintenance or replacement, and the maintenance and replacement can be completed without affecting the operation of the unit.

[0046] like Figure 5 As shown, the skid-mounted device may be composed of two skid-mounted units, or one skid-mounted unit may include two parallel processing sections. It should be understood that it may also be composed of several skid-mounted units and will not be described one by one.

[0047] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A self-circulating complex iron wet desulfurization skid-mounted device, characterized in that: The invention comprises at least one skid-mounted unit (1) suitable for skid mounting, wherein the skid-mounted unit (1) comprises at least one absorption treatment section (2) for absorption reaction with sulfur-containing gas and / or at least one oxidation treatment section (3) for regenerating desulfurized liquid; the absorption treatment section (2) or the oxidation treatment section (3) comprises a gas distributor (4), and the gas distributor (4) promotes the outflow of desulfurized liquid from the absorption treatment section (2) or the oxidation treatment section (3) for self-circulation of desulfurized liquid; The head and tail of the skid-mounted unit (1) are connected via a liquid pipeline (5) to form a self-circulation of the desulfurization liquid; or The head and tail of adjacent skid-mounted units (1) are connected via a liquid pipeline (5), and the head and tail of the entire skid-mounted device are connected via a liquid pipeline (5) to form a self-circulation of the desulfurization liquid.

2. The self-circulating complex iron wet desulfurization skid-mounted device according to claim 1, characterized in that: The skid-mounted unit (1) comprises at least one absorption treatment section (2), at least one oxidation treatment section (3) and at least one settling zone (7) for desulfurized liquid precipitates.

3. The self-circulating complex iron wet desulfurization skid-mounted device according to claim 1 or 2, characterized in that: The absorption treatment section (2) further comprises an absorption zone (21) separated by a first weir plate (22), wherein the absorption zone (21) is provided with a gas distributor (4) for mixing the sulfur-containing gas with the desulfurized liquid and pushing the desulfurized liquid to flow out from the top of the first weir plate (22); The oxidation treatment section (3) further comprises an oxidation zone (31) separated by a second weir plate (32), wherein the oxidation zone (31) is provided with a gas distributor (4) for mixing the oxygen-containing gas with the desulfurized liquid and pushing the desulfurized liquid to flow out from the top of the second weir plate (32).

4. The self-circulating complex iron wet desulfurization skid-mounted device according to claim 3 is characterized in that: A first baffle (24) is arranged behind the first weir plate (22) of the absorption zone (21), and a reaction zone (23) is formed between the first weir plate (22) and the first baffle plate (24) for causing hydrogen sulfide in the desulfurized liquid to undergo a reduction reaction.

5. The self-circulating complex iron wet desulfurization skid-mounted device according to claim 3, characterized in that: A second baffle (34) is arranged behind the second weir plate (32) of the oxidation zone (31), and a degassing zone (33) is formed between the second weir plate (32) and the second baffle plate (34) for causing the complex iron in the desulfurization liquid to undergo an oxidation reaction.

6. The self-circulating complex iron wet desulfurization skid-mounted device according to claim 1, characterized in that: The skid-mounted unit (1) further comprises a box body suitable for container transportation; a desulfurization liquid supply unit is arranged in the box body, and / or an air supply unit is arranged in the box body, and / or a sulfur-containing gas supply unit is arranged in the box body, for supplying desulfurization liquid, air and sulfur-containing gas respectively.

7. The self-circulating complex iron wet desulfurization skid-mounted device according to claim 1, characterized in that: The gas distributor (4) is detachably connected to a gas delivery pipeline (6), and a control valve for controlling the flow rate of the gas distributor (4) is provided on the gas delivery pipeline (6).

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